Dynamo or magneto electric machine



(No Model.)

P. P. NUNGESSBR.

DYNAMO 0R MAGNETO ELECTRIC MACHINE.

No. 287,774. Patented Oct. 30, 1883.

N. PErlZRs. Phommmgnplw. vla-ningun, D. C.

UNITED STATES PATENT OFFICE.

PHILIP P. NUNGESSER, OF CLEVELAND, OHIO.

DYNAMO OR MAGNETO ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No.287,774, dated October 30, 1883. Application filed September 25, 1883. (No model.)

T0 @ZZ whom, it 77mg concern:

Be it known that I, PirrLir P. NUNcEssER, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Improvement in Dynamo or Magneto Electric Machines 5 and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to the cooling of dyname or magneto electrical machines, and it consists of a special and improved form of air forcing device adapted to be fixed to the ends of the rotating armature, and to force air to the interior of said armature, and thence through openings in the peripheryT to the outside. Heretoi'ore various devices have been used for this purpose-such as exterior blowing-machines adapted to force air into or upon the machine-and wings have been placed on the shaft of the revolving armature in order to dei'lect currents of air against parts liable to be heated, as in the United States Patent of Virsching, oi'N ovember 15, 1881. Myspeeial object is to force air positively7 by means of a simple device, into the interior of the hollow armature from both ends toward the center, and to cause the air t-hus driven or compressed into the interior to escape in forcible currents through openings in the periphery of the armatures. I thus propose to maintain an active and rapid circulation of air through the apparatus, and to keep all the parts perfectly cool.

-In the accompanying drawings, Figure l is a perspective view of the outside of the disk. Fig. 2 shows an edge elevation with the armature in outline." Fig. 8 is an inside view oi" the disk.

The air-forcing device consists of a disk, A, spun or otherwise formed in an approximately saucer shape, to form a shallow chamber, with an annular flange, c, by means of which it may be fastened by screws l to the armature. The disk is eut on curved lines 2 2, as shown, and the lip, on one side of each cut, is bent or pressed slightly outward to form a iiange or hood, 3, adapted to catch the air as the armature revolves and direct it to the interior thereof. is many of these hoods may thus be formed as may be desired. The hoods 'for the opposite ends are formed in reverse direction, so that when in place they may all face in the direction in which the armature revolves. \Vhen in place upon the armature, the disl; forms a practically close chamber of the interior, excepting the escape-openings in the periphery. The interior oi' the armature is hollow or formed with tubular passages ruiming parallel with the axis `and through the armature. rIhe tribes, if used, have radial openings to permit the air to diverge to all parts of the armature. In order the more directly to force the air to these passages or to the hollow interior, I place gnide-llanges c on the inside of the disk, and in the position shown in Fig. 3, in order to catch the currents from the hoods and direct them to the passages. It will be understood that there are lateral or peripheral openings, through which the air is driven both by the force of the hoods and the centrifugal action oi' the revolving armature.

I claim as my inventionl. In combination with the revolving armature oi' a d ynamo-electrical machine, a disk, A, having a shallow chamber, and hoods 3, said disk being fastened to the end of the ar mature, and adapted to force air tothe interior, substantially as described.

2. In combination with the chambered disk having hoods, and with the revolving armature, the guide-flange c, placed in the relation to the interior passages or opening of the armature, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PHILIP P. NUNGESSER.

Vitn esses:

FRANK L. MIDDLETON, WALTER DoNALDsoN. 

